Luke Alphey Posted about 1 year ago Hadyn Parry: Re-engineering mosquitos to fight disease Long-lasting insecticide-impregnated bednets (LLINs) have been - and are - very effective. However only a single class of insecticide, pyrethroids, is suitable for use on bednets, so widespread use will almost inevitably lead to resistance. This is already being seen. The development of new, effective tools would allow multiple tools to be used in combination, thereby not only being more effective but reducing the selective advantage from resistance to any one intervention and hence prolonging the useful life of all. So even though bednets are good it would still be wise urgently to develop and deploy additional control methods.